Step 1Cut cabbage into 2-inch wedges and core. Place in 13x9-inch baking dish.
Step 2Season pork chops with salt and pepper. Sear chops in butter over high heat, 2 minutes per side, reserving skillet drippings.
Step 3Place chops atop cabbage in baking dish and arrange onion slices around them. Pour skillet drippings over.
Step 4Cook noodles in boiling salted water according to package directions until al dente, 8 to 12 minutes. Drain noodles, then add noodles and chicken broth to baking dish, along with 1 1/2 teaspoons salt and 1/2 teaspoon pepper.
Step 5Cover and bake at 450 degrees 20 minutes, then reduce heat to 350 degrees and bake until pork chops are tender, 20 to 40 more minutes.